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Old 01-17-2009   #1 (permalink)
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Unanswered: single pot vs two pot calipers

hello. I'm a manta b owner and I have a dilemma.

I bought the car with the ate(?) two pod (48 or 40mm) calipers installed and non ventilated 248 disks.

I also have a pair of later single pod (54mm?) manta b gt/e calipers lying around.

The question is which setup is better, single pot or two pot calipers on my manta.

Excuse me for my english and thank you in advance.
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Old 01-17-2009   #2 (permalink)
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In my opinion you don't have a dilemma at all

Most people I know who bought cars with the single pot "floating" calipers have converted to the older two pot fixed caliper type.

In ideal conditions I guess there isn't too much difference in performance between them for road use, however the "floating" types are very prone to seizing up due to corrosion unless well maintained, meaning that during light braking you would pretty much be using just the pad on the piston side, and then you stomp on the brakes a bit and the caliper moves and you get both pads working, however when you release the brakes again....they're once again stuck, but now with the pad on the opposite side of the piston dragging until the movement of the disc frees them up again, but this leads to excessive pad wear and the possibility of warped disks, not to mention uneven braking action side to side....ugh, stay away, they were a horrible design if you ask me

The only thing that would make me consider running the floating type is if they came off a Rekord 2.2i along with the ventilated disk
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Old 01-21-2009   #3 (permalink)
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Originally Posted by ggl View Post
The only thing that would make me consider running the floating type is if they came off a Rekord 2.2i along with the ventilated disk
Will the rekord 2.2i ventilated disks and calipers fit directly on my manta b without any modds?
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Old 01-21-2009   #4 (permalink)
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Originally Posted by ggl View Post
Most people I know who bought cars with the single pot "floating" calipers have converted to the older two pot fixed caliper type.

In ideal conditions I guess there isn't too much difference in performance between them for road use, however the "floating" types are very prone to seizing up due to corrosion unless well maintained, meaning that during light braking you would pretty much be using just the pad on the piston side, and then you stomp on the brakes a bit and the caliper moves and you get both pads working, however when you release the brakes again....they're once again stuck, but now with the pad on the opposite side of the piston dragging until the movement of the disc frees them up again, but this leads to excessive pad wear and the possibility of warped disks, not to mention uneven braking action side to side....ugh, stay away, they were a horrible design if you ask me.
I believe "on paper" the single pot calipers are superior as they are lighter in weight and probably cause less issues with wheel clearance. Now from theory to practical. My first experience with sliding calipers was warping of rotors and the calipers cocking slightly and wearing one end of the pad down almost to the metal while the other end still had at least 75% of the pad left. My first experience was a 1985 Dodge truck, I have noticed newer stuff has the sliding mechanism sealed and lubed and appears to work fairly well.

If the single pot calipers are of the earlier type I would prefer the two pot fixed caliper ones. I believe they will give you less problems.

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Old 01-22-2009   #5 (permalink)
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Originally Posted by xtcvampire View Post
Will the rekord 2.2i ventilated disks and calipers fit directly on my manta b without any modds?
I believe they will as long as you get the complete brake assembly, but you will need to run 14" or bigger wheels
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